A building frame is a temporary auxiliary framework erected on a construction site to support, guide, or shape permanent building elements during construction. It is removed once the permanent structure is self-supporting.
Application
Temporary frameworks are used throughout the building process to hold components in position until they can stand on their own. For DIY builders, understanding these temporary supports is essential for safe and accurate construction.
Types of temporary building frames
Formwork (shuttering)
Moulds built from timber, plywood, or steel into which wet concrete is poured. The formwork holds the concrete in the desired shape — walls, columns, beams, or slabs — until it has cured and gained enough strength. After curing, the formwork is stripped away.
- Timber formwork is the most accessible option for DIY builders.
- Panels can often be reused several times if well maintained.
- Apply a release agent (mould oil) to the inside face for clean removal.
Falsework and propping
Temporary supports — usually adjustable steel props — that carry the weight of floors or beams during construction. Falsework holds elements at the correct height until they are permanently fixed or until concrete reaches its design strength.
Centering
A curved temporary frame used to support an arch during construction. The bricks or stones of the arch are laid over the centering, and it is removed once the keystone is in place and the arch is self-supporting.
Bracing
Diagonal timber or steel members temporarily fixed to a structure to keep it plumb and square while connections are being made. Common in timber-frame and steel-frame construction during the erection phase.
Tips for DIY builders
- Always calculate the load your temporary frame must carry before building it — underbuilt formwork is a common cause of concrete blowouts.
- Use adjustable steel props rather than timber packing for height-critical support — they are safer and more precise.
- Remove temporary frames carefully and in the correct sequence to avoid overloading any part of the structure.
- Inspect formwork and props before each use; damaged components should be replaced, not repaired.
Related terms
- Concrete
- Construction method
- Load-bearing wall
- Construction process
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